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G3GM 1973 to 1977 A-bodys. Chevelles, Monte Carlos, El Caminos, Laguna, 442, Cutlass, Malibu, GTO, LeMans, Century, Regal, Grand Am, Grand Prix, Sprint, Gran Sport, Can Am, Hurst-olds, and other 73-77 A-bodies


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G3GM :: G3 Tech :: Part interchangeability

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Post by McCauley5983 Thu May 12, 2011 8:37 pm

got the 95 impala rearend swapped in posi works great disk brakes are awesome and the parking brake even works. one inch drop in the rear
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Post by JB2wheeler Thu May 12, 2011 8:51 pm

Way to go, Billy Ray. Nice improvement. JB
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Post by Limey SE Thu May 12, 2011 9:34 pm

Nice Job Billy-Ray she sits real nice back there now .................

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Post by McCauley5983 Thu May 12, 2011 9:39 pm

all for under 600 bucks Cool now ima start planning my engine and hopefully be able to afford it some day
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Post by Limey SE Thu May 12, 2011 9:41 pm

I just wished I could work on mine LOL

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Post by McCauley5983 Thu May 12, 2011 9:44 pm

i wish i had more funding for mine but it is what it is
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Post by ss2323ss Thu May 12, 2011 10:31 pm

Coooooool !
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Post by badtemper44 Fri May 13, 2011 11:35 am

What's the bolt pattern size on those rearends?
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Post by The Dude Fri May 13, 2011 1:10 pm

5x5
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Post by pila Sat May 14, 2011 12:16 am

That's interesting. I wasn't aware that mid-90s full size rears were the same tread width.

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Post by McCauley5983 Sat May 14, 2011 9:35 pm

same dimensions looks like a lighter casting might have to run different backspacing with the rear disks but still experimenting and i wont know till i go buy rims
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Post by 1973 454 MONTE Sat May 14, 2011 10:17 pm

nice job....Thumbs up

i could never do that to mine cuz i would loose my corvette aluminum wheels Sad
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Post by dragons_lair59 Sat May 14, 2011 10:21 pm

think my 91 has 5x 4 3/4 and found out its a limited slip woot woot
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Post by JB2wheeler Sat May 14, 2011 11:52 pm

dragons_lair59 wrote:think my 91 has 5x 4 3/4 and found out its a limited slip woot woot
I consider the 8.5 inch 10 bolt a good rear end. I hate to break it to you, but you might have the weak 7.5 inch 10 bolt. I could be wrong, am going by memory and its pretty much shot. The reason I say this is because I was thinking the 8.5 had the 5x5 bolt pattern only in 91. Confirmation anyone? JB
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Post by 1973 454 MONTE Sun May 15, 2011 12:06 am

my 86 box caprice has 4 3/4.

i think the bubble caprices had 5x5
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Post by McCauley5983 Sun May 15, 2011 12:29 am

i got a 10 bolt 30 spline axles and an auborn posi with 308
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Post by The Dude Mon May 16, 2011 10:42 am

1973 454 MONTE wrote:nice job....Thumbs up

i could never do that to mine cuz i would loose my corvette aluminum wheels Sad

X2!

JB2wheeler wrote:
dragons_lair59 wrote:think my 91 has 5x 4 3/4 and found out its a limited slip woot woot
I consider the 8.5 inch 10 bolt a good rear end. I hate to break it to you, but you might have the weak 7.5 inch 10 bolt. I could be wrong, am going by memory and its pretty much shot. The reason I say this is because I was thinking the 8.5 had the 5x5 bolt pattern only in 91. Confirmation anyone? JB

1973 454 MONTE wrote:my 86 box caprice has 4 3/4.

i think the bubble caprices had 5x5

Police package Caprices got 5x5 bolt pattern. If you have 5x4.75 bolt pattern then you have the weaker 7.5 rear 10 bolt. The good rear axle is 8.5 & had a 5x5 bolt pattern for sure. My 90 is a box & it has 5x5 8.5 rear with drum brakes & 3.42 gears. I would have changed this over to Brown Eye for the gearing & 30 spline axles, but I'd lose my wheels & posi. Sad
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Post by McCauley5983 Mon May 16, 2011 8:31 pm

as for the wheels if you really wanted too keep the 4.75 bolt pattern im pretty sure you would just have to replace axles with aftermarket but i was working on a budget so 5x5 is what i kept
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Post by orange Juiced Tue Jul 17, 2012 3:39 pm

I finally got one after a month of chasing an ad on Craigslist, it came off a 93 caprice 9c1. The guy threw in the sway bar, springs and transaxle for $100, but no trailing arms.

I know its a direct bolt on, but do i need to do anything special to the brake system or axel since these cars came with abs? Can use the stock master cylinder/booster? And do I need to change the brake combo valve?

Thanks for the help
Eddie - O.J.

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Last edited by orange Juiced on Tue Jul 17, 2012 3:43 pm; edited 1 time in total (Reason for editing : Added pic)
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Post by dragons_lair59 Tue Jul 17, 2012 5:48 pm

not 100% but maybave to get a diff prop valve
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Post by 77mali Wed Jul 18, 2012 4:10 pm

That looks nice OJ...good deal.
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Post by thatfnthing Wed Jul 18, 2012 9:30 pm

orange Juiced wrote:I finally got one after a month of chasing an ad on Craigslist, it came off a 93 caprice 9c1. The guy threw in the sway bar, springs and transaxle for $100, but no trailing arms.

I know its a direct bolt on, but do i need to do anything special to the brake system or axel since these cars came with abs? Can use the stock master cylinder/booster? And do I need to change the brake combo valve?

Nice score! I would use the Caprice combo valve -- not because of the ABS, but because of the change from drums to discs. The disc calipers need to retain more fluid, so the pressure valving is probably different.

As far as the ABS is concerned, if you're not going to use it, simply plug the hole in the side of the diff with a spent sensor to retain the oil. The sensor and the reluctor band it reads on the pinion shaft are the only "parts" of the ABS that actually reside on the rear itself, and play no active part in the operation of the axle or brakes without the computer and modulator up front.

Mark
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Post by brownbomber77 Thu Jun 06, 2013 1:31 am

Everything bolts right in, just redrill the axles and fab up your own parking brake cables which can be cut and matched to the factory ones with some playing around. The center brake hose is the same, as well

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Post by thatfnthing Thu Jun 06, 2013 8:45 am

brownbomber77 wrote:...and fab up your own parking brake cables which can be cut and matched to the factory ones with some playing around.

I used these when I had to redo the e-brake for a new crossmember. They worked quite well, and can be hooked to the stock cable coming from the pedal:

Lokar e-brake cable
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